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This will open your HTML document in Notepad so that you can make changes to the
file. After making the required changes, you need to save the file by pressing the
Ctrl+S keys.
If your web page is already opened in a web browser, you need to press the F5 key to see
the changes you have made.
Introducing CSS3
CSS stands for Cascading Style Sheets. It is used for designing or styling a web page. It HTML—AN INTRODUCTION
handles and describes how an HTML web page will be presented on a web browser. It helps
save a lot of time, as one design layout can be used to create multiple web pages. The latest
version of CSS is CSS 3.
CSS comprises style rules that are interpreted by the web browser and then applied to the
corresponding elements in HTML web page. Syntax to create a style in CSS is: 87
selector{property1:value1; property2:value2; … …}
Where, selector refers to an HTML tag to which a style will be applied like <BODY>. The
property1 is a property of CSS that can be used to create a style and value1 is the valid
value of the property. A semicolon should be used at the end of the property-value if more
than one property is used. However, you can skip the semicolon if only one property is used.
All the properties and their values are enclosed within curly braces. For example, if you
want to create a style that fills a background colour in a web page, then you need to use the
background-color property of CSS in the following manner:
body {background-color:green}
In the preceding code, body signifies the <BODY> tag, background-color is the property and
green is the value of property that will change the background colour of the web page to
green.
Using CSS Style
There are three ways to use the CSS styles in HTML document which are:
• Inline style sheet
• Internal Style Sheet
• External Style Sheet

